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45 results on '"Hsu, Shu-Min"'

10. Fast SARS-CoV-2 virus detection using disposable cartridge strips and a semiconductor-based biosensor platform

Author

Xian, Minghan, primary, Luo, Hao, additional, Xia, Xinyi, additional, Fares, Chaker, additional, Carey, Patrick H., additional, Chiu, Chan-Wen, additional, Ren, Fan, additional, Shan, Siang-Sin, additional, Liao, Yu-Te, additional, Hsu, Shu-Min, additional, Esquivel-Upshaw, Josephine F., additional, Chang, Chin-Wei, additional, Lin, Jenshan, additional, Ghivizzani, Steven C., additional, and Pearton, Stephen J., additional

Published
2021
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14. Titanium Corrosion in Peri-Implantitis

Author

Soler, Mailis D., primary, Hsu, Shu-Min, additional, Fares, Chaker, additional, Ren, Fan, additional, Jenkins, Renita J., additional, Gonzaga, Luiz, additional, Clark, Arthur E., additional, O’Neill, Edgar, additional, Neal, Dan, additional, and Esquivel-Upshaw, Josephine F., additional

Published
2020
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23. Cover Image

Author

Hsu, Shu‐Min, primary, Ren, Fan, additional, Abdulhameed, Nader, additional, Kim, Mijin, additional, Neal, Dan, additional, and Esquivel‐Upshaw, Josephine, additional

Published
2019
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25. Self-Assembled Nanomaterials Based on Perfluorophenyl-Capped Dipeptides

Author

Chang Jui-Wen, Hsu Shu-Min, Lin Yu-Chun, Lin Hsin-Chieh, and Liu Yu-Hao

Subjects
Supramolecular hydrogels, Chemistry, Self-healing hydrogels, technology, industry, and agriculture, Nanotechnology, macromolecular substances, Biocompatible material, complex mixtures, Self assembled, Nanomaterials
Abstract

Herein, we report a series of low-molecular-weight hydrogelators and prove that the phenyl-perfluorophenyl pair in the structure of the hydrogelators can be used to promote the formation of the supramolecular hydrogels in physiological condition. Further spectroscopic study indicates the aromatic-aromatic and hydrogen-bonding interactions might be the major driving force behind the self-assembly of the nanostructured hydrogels. Biocompatible experiments of the hydrogelators were carried out on HeLa and MCF-7 cells which indicate the newly discovered hydrogelators are potential biomaterials.

Published
2015

26. Demonstration of SiO2/SiC‐based protective coating for dental ceramic prostheses.

Author

Chen, Zhiting, Fares, Chaker, Elhassani, Randy, Ren, Fan, Kim, Mijin, Hsu, Shu-Min, Clark, Arthur E., and Esquivel‐Upshaw, Josephine F.

Subjects
DENTAL ceramic metals, CERAMIC coating, DENTAL ceramics, PROTECTIVE coatings, PLASMA-enhanced chemical vapor deposition, DENTURES
Abstract

SiO2/SiC coatings were deposited onto ceramics disks using plasma‐enhanced chemical vapor deposition. The effects of deposition pressure and gas‐flow ratio on the refractive index, extinction coefficient, and SiC composition were studied. For the highest studied SiH4 to CH4 gas‐flow ratio of 1.5, the refractive index increased by 17% from 2.53 (at the wavelength of 845 nm) to 2.96 (at the wavelength of 400 nm). For the lowest studied SiH4 to CH4 gas‐flow ratio of 0.5, the refractive index only increased by 4% from 2.11 (at the wavelength of 845 nm) to 2.20 (at the wavelength of 400 nm). At higher deposition pressures, the variation in refractive index of the SiC coatings was significantly lower showing a slight increase from 1.93 (at a wavelength of 845 nm) to 1.96 at a wavelength of 400 nm. Except for the case of a low SiH4 to CH4 gas‐flow ratio of 0.5, for light with wavelengths ≤650 nm, the extinction coefficient of the SiC coatings increased significantly. Light with a wavelength >650 nm had an extinction coefficient near 0 in all cases. After annealing the sample at 400°C for 4 hours, hydrogen‐related bonds broke and the stress of the film was reduced from −245 to −71 MPa. By utilizing different thicknesses of SiC, the full standard dental shade guide was matched with the ΔE of each coated disk being less than 3.3 compared to the shade guide. [ABSTRACT FROM AUTHOR]

Published
2019
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44. Novel methodology for measuring intraoral wear in enamel and dental restorative materials.

Author

F Esquivel-Upshaw J, Hsu SM, Bohórquez AC, Abdulhameed N, Scheiffele GW, Kim M, Neal D, Chai J, and Ren F

Subjects
Adult, Aftercare, Dental Enamel chemistry, Female, Humans, Male, Materials Testing, Middle Aged, Photography, Dental instrumentation, Photography, Dental statistics & numerical data, Radiography, Dental statistics & numerical data, Software, Surface Properties, Tomography, X-Ray Computed statistics & numerical data, Tooth Crown chemistry, Young Adult, Zirconium, Crowns, Dental Enamel diagnostic imaging, Photography, Dental methods, Tooth Crown diagnostic imaging
Abstract

Objectives: To test the hypotheses that (a) the chairside/handheld dental scanner combined with a metrology software will measure clinical wear in vivo in agreement with measurements from X-ray computed microtomography and; (b) polished monolithic zirconia does not cause accelerated wear of opposing enamel., Materials and Methods: Thirty single crowns were randomized to receive a monolithic zirconia or metal-ceramic crown. Two non-restored opposing teeth in the same quadrants were identified to serve as enamel controls. After cementation, quadrants were scanned using an intraoral dental scanner. Patients were recalled at 6-months and 1-year for re-scanning. Scanned images were compared using a metrology software to determine maximum vertical wear of teeth. The accuracy of the scanning measurements from this new method was compared with X-ray computed microtomography (micro-CT) measurements. Statistical analysis was performed using Mann-Whitney U test to determine significant differences between wear of enamel against zirconia, metal-ceramic or enamel. Linear regression analysis determined agreement between measurements obtained using intraoral scanning and micro-CT., Results: Regression analysis demonstrated that there is a quantitative agreement between depth and volume measurements produced using intraoral scanning and the micro-CT methodologies. There was no significant difference between the wear of enamel against polished monolithic zirconia crowns and enamel against enamel., Conclusions: Intraoral scanning combined with a matching software can accurately quantify clinical wear to verify that monolithic zirconia exhibited comparable wear of enamel compared with metal-ceramic crowns and control enamel. Agreement between the intraoral scanner and the micro-CT was 99.8%. Clinical Trials.gov NCT02289781., (© 2020 The Authors. Clinical and Experimental Dental Research published by John Wiley & Sons Ltd.)

Published
2020
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45. Annealing and N 2 Plasma Treatment to Minimize Corrosion of SiC-Coated Glass-Ceramics.

Author

Fares C, Elhassani R, Partain J, Hsu SM, Craciun V, Ren F, and Esquivel-Upshaw JF

Abstract

To improve the chemical durability of SiC-based coatings on glass-ceramics, the effects of annealing and N 2 plasma treatment were investigated. Fluorapatite glass-ceramic disks were coated with SiC via plasma-enhanced chemical vapor deposition (PECVD), treated with N 2 plasma followed by an annealing step, characterized, and then immersed in a pH 10 buffer solution for 30 days to study coating delamination. Post-deposition annealing was found to densify the deposited SiC and lessen SiC delamination during the pH 10 immersion. When the SiC was treated with a N 2 plasma for 10 min, the bulk properties of the SiC coating were not affected but surface pores were sealed, slightly improving the SiC's chemical durability. By combining N 2 plasma-treatment with a post-deposition annealing step, film delamination was reduced from 94% to 2.9% after immersion in a pH 10 solution for 30 days. X-ray Photoelectron spectroscopy (XPS) detected a higher concentration of oxygen on the surface of the plasma treated films, indicating a thin SiO 2 layer was formed and could have assisted in pore sealing. In conclusion, post-deposition annealing and N 2 plasma treatment where shown to significantly improve the chemical durability of PECVD deposited SiC films used as a coating for glass-ceramics.

Published
2020
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